# IamThermowatt vs Contact Separator

The clearest difference is in-app purchases: IamThermowatt at none against Contact Separator's 2. IamThermowatt also leads on iOS requirement (15.0 vs 17.0). Contact Separator's advantage is update cadence (every 9 days vs every 15 months). On price, ads and device support there is nothing between them.

Both are free to download. Contact Separator sells 2 in-app purchases, starting at $0.99 per month. IamThermowatt asks for nothing beyond the download.

IamThermowatt ships an update every 15 months, Contact Separator every 9 days. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | IamThermowatt | Contact Separator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/contact-separator/id6477601880/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 9 days** |
| Monetization | — | Free with in-app purchases |
| Size | 68 MB | 11 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Thermowatt SpA](https://appshunter.io/developer/1619740671) | [Lars Herres](https://appshunter.io/developer/1713803692) |

## What reviewers say

### IamThermowatt

[App page](https://appshunter.io/ios/app/iamthermowatt/id6451049295)

**Features:** macOS Compatibility

**In-app purchases:** none


### Contact Separator

[App page](https://appshunter.io/ios/app/contact-separator/id6477601880)

This utility app allows you to separate your contacts into distinct lists, such as business and personal, and protects them from unauthorized third-party access. It also provides caller identification and identifies calls within your call history.

**Highlights:** Separate contacts from standard list, Caller Identification, Call History Identification, vCard Import, Privacy protection for contacts

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Abo | $0.99 | per month |
| Lifetime | $5.99 | one-time |


## Frequently asked questions

### Is IamThermowatt free?

IamThermowatt is free to download, with no in-app purchases.

### Is Contact Separator free?

Contact Separator is free to download, with in-app purchases available.

### Do IamThermowatt or Contact Separator have ads?

Neither IamThermowatt nor Contact Separator shows ads.

### Which is updated more often, IamThermowatt or Contact Separator?

IamThermowatt ships an update every 15 months, and Contact Separator every 9 days. Most recently, IamThermowatt was updated on November 3, 2026 and Contact Separator on November 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*